Title :
Low-Power, Continuous-Time Sigma-Delta Interface for Micromachined Gyroscopes Employing a Sub-Nyquist-Sampling Technique
Author :
Dienger, Matthias ; Buhmann, A. ; Northemann, T. ; Link, T. ; Manoli, Y.
Author_Institution :
Inst. of Microsystem Technol., Villingen-Schwenningen
Abstract :
In this paper a novel system concept for the implementation of low-power readout electronics for micromachined gyroscopes is described. The main innovation is a modified Chopper Stabilization (CHS) technique in a SigmaDelta loop based on an undersampling process. It enables the design of a full Continuous-Time (CT) SigmaDelta interface dissipating less power than its Discrete-Time (DT) counterpart without additional hardware effort for a flicker noise suppression. Further a systematic design approach for an interface employing this method and an architecture enabling this procedure is presented.
Keywords :
choppers (circuits); gyroscopes; micromechanical devices; readout electronics; sigma-delta modulation; signal sampling; chopper stabilization; continuous-time sigma-delta interface; flicker noise suppression; low power readout electronics; micromachined gyroscopes; subNyquist sampling technique; undersampling process; Capacitive sensors; Computed tomography; Delta-sigma modulation; Electrodes; Electromechanical sensors; Energy consumption; Feedback; Filters; Gyroscopes; Hardware; Electromechanical ¿¿ modulator; full CT; low-power; modified CHS; undersampling;
Conference_Titel :
Solid-State Sensors, Actuators and Microsystems Conference, 2007. TRANSDUCERS 2007. International
Conference_Location :
Lyon
Print_ISBN :
1-4244-0842-3
Electronic_ISBN :
1-4244-0842-3
DOI :
10.1109/SENSOR.2007.4300346
